1 2 3 4 5 7 8 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
U. U1 U2 U3 U4 U5 U6 U7 U8 U9 Ua Ub Uc Ud Ue Uf Ug Uh Uj Uk Ul Um Un Up Uq Ur Us Ut

UJ

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating services provided at night.